Validate and select a Discourse site for subsequent tool calls.

Search site content.

Read a topic metadata and first N posts.

Read a specific post.

List categories visible to the current auth context.

List tags (if enabled).

Get basic user info.

Get a list of user posts and replies from a Discourse instance, with the most recent first. Returns 30 posts per page by default. Use the page parameter to paginate (page 0 = offset 0, page 1 = offset 30, etc.).

Filter topics with a concise query language: use key:value tokens separated by spaces; category/categories for categories (comma = OR, '=category' = without subcats, '-' prefix = exclude), tag/tags (comma = OR, '+' = AND) and tag_group; status:(open|closed|archived|listed|unlisted|public) and personal in:(bookmarked|watching|tracking|muted|pinned); dates: created/activity/latest-post-(before|after) with YYYY-MM-DD or N (days); numeric: likes[-op]-(min|max), posts-(min|max), posters-(min|max), views-(min|max); order: activity|created|latest-post|likes|likes-op|posters|title|views|category with optional -asc; free text terms are matched full-text. Results are permission-aware.

List all public chat channels visible to the current user. Returns channel information including title, description, and member counts.

List all chat channels for the currently authenticated user, including both public channels they're a member of and direct message channels. Includes unread tracking information.

Get messages from a chat channel with flexible pagination and date-based filtering. Supports: (1) paginating with direction='past'/'future' from a target_message_id, (2) querying messages around a specific target_date, (3) getting messages around a target_message_id, or (4) fetching from last read position.

List all drafts for the current user. Returns draft keys, sequences, and preview content. Use this to find existing drafts before updating them.

Retrieve a specific draft by its key. Common keys: "new_topic" for new topic drafts, "topic_" for reply drafts.